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I need to logging users that connected throw bastion host using proxycommand, I have used next command:

$ ssh -i ~/.ssh/key.pem user@ip -o "proxycommand ssh -W %h:%p user_bastio@bastion"

In the /var/log/auth.log:

Jun 18 10:44:29 bastio_host_name sshd[5064]: Accepted publickey for user_bastio from local_ip port 46806 ssh2: RSA SHA256:
Jun 18 10:44:29 bastion_host_name sshd[5064]: pam_unix(sshd:session): session opened for user user_bastio by (uid=0)
Jun 18 10:44:29 bastion_host_name systemd-logind[796]: New session 141521 of user user_bastio.

Also, I have added

export PROMPT_COMMAND='RETRN_VAL=$?;logger -p local6.debug "$SSH_CONNECTION $SSH_ORIGINAL_COMMAND $(whoami) [$$]: $(history 1 | sed "s/^[ ]*[0-9]$

to /etc/bash.bashrc , like in https://askubuntu.com/questions/93566/how-to-log-all-bash-commands-by-all-users-on-a-server , but there no commands that runs via proxycommand in /var/log/commands.log.

Is it possible to logging users and their commands that used proxycommand?

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